Centrifugal filter.



No'. 806,213. u 1 PATENTED DEG. 5, 1905.

L. o. TRENT.

GENTRIPUGAL FILTER.

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PATBNTED DEG. 5, 190.5.

L. o.l T 1m1v1.l GENTRIPUGAL FILTER. 'APPLIOATION FILED APIlfl'. 1905.

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PATENT ormoni.

,l NTED .STATES l Specification o f Letters Paten@ LAMARTINE e. TRENT, or VANTRENT, CALIFORNIA. t CENTRIFUGAL FILTER.

Patented I Dec.v 5, 1905- Application led April 1.7, 1905. Serial No. 255,939.

c' the mass orbody fof. 'material to betreated,

such as slimes and peat and sugar, although the machine is equally aswell adaptedl for the treatment of any materiali from which the water contained therein is to be removed or extracted, the object of the Ainvention being to deliver the filtered material which is received in the form ofa pulp in a solid and comparatively dry condition from the surface of a revolving screen onto thel surface of which the l material to be treated is delivered from any suitable source of supply.

.To comprehend the invention, reference Should be had to the accompanying drawings, f

wherein- Figure 1 is a vertical sectional side view in elevation of the apparatus. Fig. 2 is a plan view of the screen onto which the material to be treated is delivered, and Fig.' 3 is a'vp'lan.

view of the apparatus.

In the drawings the numeral lis used to in- Y'dicate any suitable form of base which sup fas ports the circular platform 2 for receiving the filtered material delivered from the revolving screen.

Through the base 1 extendsa' vertical shaft '3, which VWorks inthe bearings 1 4:'. of this Akshaft is secured the bevel-gear5,which V gear meshes withfa'pinion 5', secured to the. inner end of the longitudinallyarrangeddriveshaft, said'shaft being driven .by means of.

a suitable pulley-belt (notfshown) working over the pulley-wheel 6', attached to the outer end portion of thesaid shaft. The foregoing simply constitutes one form of means forimparting rotary motion to the vertical'shaft-3, which, however, may be driven by any other suitable form of driving means.

' Y, To the vertical shaft 3 is fastened a collar 7 Whichis held such a distance above the base This platform 'is preferably cone-- shaped, although it is apparent thatsuch is van immaterial feature.

To the lower projecting-end 1 as to 'permit of rotatable sleeve 7 being fitltedonto the said shaft intermediate the col' lar 7 .and the upper end of the basel, Fig. 1v

of the drawings. The upper face of the collar 7-1s cut atan incline and on the same works the revolvingcircular screen-frame-S, whichl is held in placeon the said collar by means of 4 the vertical'shaft 3, whichr shaftfextends loosely through an inclined or elliptical shaftopening 8' formed through the hub 9 ofy the screenfframe.

shaft 3 the said frame is free to rotate in an inclined vertical plane on its own aXis. The

ing material 11, such as canvas or fine-mesh Ascreen-wire or a combinationv of canvas and a metallic reticulated material. a

As the screen-frame, which shall hereinafter be termed a .screen,is supported on thel in' clined upper surface of the collar 7, which in turn is bolted or otherwise secured to the vertical shaft 3, it is obvious that as the said shaft 3 rotates horizontally on its own aX'is the screen .will be revolved horizontally with the rotaryA "motionofthe said vertical shaft, thedrive mech-` anism for which is so arranged as to impart a rotation to said shaft ofA approximately four 'hundred revolutions per minute. -The rota- "tive speed of the said shaft is dependent greatly onv the nature of the material to be treated,

for certain materials may require that the shaft' be driven at a higher. speed `than four hundred -revolutions per minute.

In order that the inclined screen may have rotation in a vertical plane on its 'ownvaxisf f independent lof the horizontal movementim- I parted thereto by the vertical'shaft 3, there is secured to the .under face of the screens hub .9 a cog-ring 12. This ring mesheswith lthe pinion' 12', formedfon the upper end of i the sleeve'Z'.

on the shaft' 3, has rotation imparted thereto Thesleeve 7', which ts loose from'the'driveshaft 13, the gear 14:'on the inner endthereof meshing `with-the gear 14' on the lower end of thesaid sleeve7'. The

rotary motion of the'sleeve'7 is thus trans-- By means of this connection, 'between' the screen-frame and the vertical.

. open sections 10 of the screen-frame are closed -or covered by means of any-suitable strain- IOO mittedto Vimpart vertical rotation to the in-A clined screen, the speed at which the screen is rotated being about one hundred revolutions .per minute. However, this speed may be in-` creased or decreased, depending on the nature of the material to'be worked. It will thus be observed that the screen has a horizontal rotation or movement imparted thereto by the rotary motion of the vertical shaft and that it also has a vertical rotation on its own axis independent of the rotation of the vertical shaft.

The angle of inclination at which the screen stands is dependent on the inclination given to the upper surface of thesupporting-collar 7, which should'be arranged as practicalworking may dictate. represented by theV drawings is deemed the most suitable for the screen.

The upper end portion of the vertical shaft is made hollow for a given distance to provide a receiving-chamber 15, into which the pulp or semiliquid material to be treated is delivered'. From the chamber 15 extends the chute or outlet-spout 15, through which the material discharges onto the upper surface of the inclined screen or filter disk.

To wash the face of the screen or filter disk for lubricating the'surface thereof or to add moisture to the material being treated, a water-supply pipe l'extends into the receivingchamber and communicates with an outletpassage 16.

To an outwardly-extending fiangel?, projecting from the collar 7', there is bolted a hopper 17. This' hopper. is arranged above the'ho'rizontal centerline of the screen and at the back thereof, the purpose being to receive the liquid constituents forced through the surface ofthe screen. This hopper communicates with a launder 18, into which is discharged the water separated from the material treated on' thev surface of the revolving screen and from which it is ledto any suitable place of deposit.

In operation the vertical shaft is driven at' a high velocity, similar to any ordinary centrifugal machine'. is introduced into thefreceiving-chamber 15 and from thence is discharged from spout 15l onto the upperscreen-surface portion of the inclined circular screen,.which is being revolved horizontally with the vertical shaft, the screen at the same timey being independently revolved in a vertical plane on its own axis, which'con'stantly subjects a changing portion of the screen to the centrifugal influence. The liquid constituents of the material under treatment or discharged onto the upper surface of t'hescreen will by centrifugal action due to the'h'igh'spe'e'd at'which the screen is revolved horizontally be' forced through the meshes of the screens'ksurface always above the horizontal line and intothe hopper or receiver' 17. Owing to the inclination of the orbit of the revolvingscreen, the'materi'al remaining thereon after having been'carried However, the inclinationv The material to be treated below the horizontal center line will'be thrown by centrifugal action due to the'highspoed at which the screen is revolved vertically off of the sc're'n onto they receiving.y t'able or platform 2, from whence the material may How by gravity or be removed therefrom in any suitable manner. The Weight of the moving parts of the machine is carried by the ballbearing 19. The centrifugal strains due to the horizontal rotation thus act to force the liquid through the mesh of the screens surface at the upper portion thereof, while the centrifugal strains due to the verticalE rotation of the screen act to discharge the screened material from the lower' halfofv the 'revolving screen onto the receiving table or' plat-- form;

Havingv thus described the invention, what is claimed as new,.a'nd desired tobeprotect'ed by Letters Patent, isp 1. A filter for removing or'separating the' liquid from material to be treated, the same consisting of a screen arrangedat an incline toA the horizontal, of means for revolvlng the'y speed, a screen fitted on'y said: shaft at anangle to the horizontal, connection for moving'said' screen with the' horizontal rotationV of the vertical shaft, and means for independently rotating the screen in a plane atl right angles to its own axis during theihorizontall rotation of the vertical shaft.

3. A filter for the removing or separatingof liquid from material' to be treated,the^same' comprising a screen arranged at an' angle to the horizontal, of' means for revolving the same in a horizontal plane and simultaneously` rotating the same in a plane at'v right anglesv`- to its own axis;

4. A filter for the removingorseparatingoff liquid from material'tobetreated, the same comprising'a-screen set at an angleto the-horizontal, of means for rotating the screen about' a vertical axis, of independent means folsil-l multaneously rotating the screen" in a' plane"` at right angles to' its own axis, and a platform for receiving the material discharged from the rotating screen.

5. A filter for removing or sepa'ratingfliq-- uid from material to be treated, thes'amecomprising a screen arranged atan` angle tothe horizontal, of means for rotating the samein IOS IZO

to its Own axis, means for delivering the ma-r f In testimony WhereOf have hereunto set terial to be 'treated to the upperl surface of hay hand this 28th day of March,y 1905.

the screenduring its rotation, a device ar- A ranged at the baekof the screen to receive v LAMARTINE C' TRENT 5 the separated liquid, and a receiving-table Witnesses:

below the screen onto which the material dis.- WM. F. BOOTH,

charged therefrom is delivered. p J. COMPTON. 

